Is it best, as a solo traveler in Sardegna, to A) rent a car from Cagliari to Olbia for a few days of B&B's and beaches along the way? Or B) take bus/train direct for a longer stay in one nice Olbia hotel? I really want to make this part of my month here all about R&R on the beach, but not sure if I'm saving myself trouble by traveling one way vs. the other. Plus my funds are low-moderate, so this is a factor. Thanks!